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http://dx.doi.org/10.3741/JKWRA.2014.47.12.1155

Complementary Relationship Based Evaportranspiration Estimation Model Suitable for the Hancheon and Kangjeongcheon Watersheds in Jeju Island  

Kim, Nam Won (Water Resources Research Division, Water Resources & Environment Research Department, Korea Institute of Civil and Building Technology)
Nah, Hanna (Water Resources Research Division, Water Resources & Environment Research Department, Korea Institute of Civil and Building Technology)
Lee, Jeongwoo (Water Resources Research Division, Water Resources & Environment Research Department, Korea Institute of Civil and Building Technology)
Lee, Jeong Eun (Water Resources Research Division, Water Resources & Environment Research Department, Korea Institute of Civil and Building Technology)
Publication Information
Journal of Korea Water Resources Association / v.47, no.12, 2014 , pp. 1155-1163 More about this Journal
Abstract
The complementary relationship-based evapotranspiration models, namely, AA model of Brutsaert and Stricker (1979) and the CRAE model of Morton (1983) was applied to two permanent stream watersheds Jeju island for the first time, and their major optimal parameters were suggested in this study. The representative watersheds for model calibration and validation were selected as the Hancheon watershed located in the northern part of the Jeju island and and the Kangjeongcheon watershed in southern Jeju island, respectively. The estimated actual evapotranspiration for the Hancheon watershed was compared with the result by the hydrological model, and the major parameters of the AA and CRAE models were calibrated until their results match the hydrological simulations. Through the iterative estimations, the optimal parameters were determined as ${\alpha}=1.00$, $M=30.0Wm^{-2}$ of the AA model, and $b_1=33.0Wm^{-2}$, $b_2=1.02$ of the CRAE model. The calibrated AA and CRAE models were applied to the Kangjeongcheon watershed for model validation, and it was found out that both models can accurately produce the actual evaporation on annual and semiannual bases.
Keywords
potential evapotranspiration; actual evapotranspiration; complementary relationship; AA model; CRAE model;
Citations & Related Records
Times Cited By KSCI : 9  (Citation Analysis)
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